Over 20 years of Valve Production and Research
The hydraulic control valve is a valve controlled by water pressure. It consists of a main valve (as shown in Figure 1) and its attached conduits, pilot valves, needle valves, ball valves and pressure gauges.
According to different purposes, functions and places, it can be evolved into remote control float valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve, etc. The hydraulic control valve separates the membrane type and the piston type. The working principle is the same. Both are driven by the pressure difference △P between the upstream and downstream, and are controlled by the pilot valve, so that the hydraulic differential operation of the diaphragm (piston) is completely automatically adjusted by hydraulic power, so that Make the main valve disc fully open or fully closed or in a regulating state. When the pressure water entering the control chamber above the diaphragm (piston) is discharged to the atmosphere or the downstream low-pressure area, the pressure acting on the bottom of the valve disc and below the diaphragm is greater than the pressure above, so the main valve disc is pushed to fully open. When the pressure water entering the control chamber above the diaphragm (piston) cannot be discharged to the atmosphere or the downstream low-pressure area, the pressure value acting on the top of the diaphragm (piston) is greater than the pressure value below, so the main valve disc will be moved. Press it to the fully closed position; when the pressure value in the control chamber above the diaphragm (piston) is between the inlet pressure and the outlet pressure, the main valve disc is in a regulating state, and its regulating position depends on the needle valve and adjustable valve in the conduit system. Combined control action of the pilot valve.
The adjustable pilot valve can open or close its own small valve port according to the downstream outlet pressure, so as to change the pressure value controlled above the diaphragm (piston) and control the adjustment position of the main valve disc.
Main external dimensions and connection dimensions
The main technical parameters